Frame for typewriters, calculating machines, and the like



March 29, 1938. R. STUHLMACHER 2,112,351

ULATING MACHINES AND THE LIKE Filed Aug. 30, 1935 l 1 ,fzvemior;

" 9 6 fluid/'1 dl'ulzmadiner Patented Mar. 29, 1938 UNITED STATES FRAME FOR TYPEWRITERS, CALCULATING MACHINES, AND THE LIKE Richard Stuhlmacher, many, assignor to Siegmar, in Saxony, Ger- Wanderer-Werke vorm.

Winklhofer & Jaenicke Akt.-Ges., Schonau, near Chemnitz, Germany Application August 30, 1935, Serial No. 38,639 In Germany September 5, 1934 4 Claims.

The invention relates to frames for typewriters, calculating machines and other office machines composed of a plurality of external members.

Heretofore such frames, after their assembly,

required finishing at the joints of the external members to remove unavoidable irregularities and projecting edges at the abutting places in the outer surfaces of the frame members. The joint seams had to be polished and smoothed by hand. The assembled frame was lacquered so that the butt joints were entirely covered whereby the frame could not be taken apart without injuring its external surface.

The object of the present invention is to overcome these disadvantages and to simplify the manufacture of the frame and the assembly of its parts into a frame of pleasing appearance.

According to the present invention, these objects are achieved by providing on the external surfaces of the frame members at the abutting places, recesses or projections extending along the scams or butts.

The invention is illustrated by way of example in the accompanying drawing, in which:

Figure 1 is a perspective View of the frame, from the rear,

Figs. 2 and 3 are elevatio-nal and sectional plan views, respectively, of a detail, and on a larger scale, Fig. 3 being taken on line 33 of Fig. 2, and

Fig. 4 is a sectional view, also on a larger scale, of a modified form of joint.

The frame illustrated in Fig. 1 is a typewriter frame consisting mainly of two side members I, a front member 2 removably connected to the side members and surrounding the keyboard on three sides, a rear member 3 also removably connected to the side members I, and a number of transverse members 4, 5, 6, l, and 8 for supporting working parts and internally bracing the 40 frame.

At abutting places of the main outer members I, 2, and 3 of the frame recesses 50 are provided in the surfaces of the machine which are external and visible when it is finished, these recesses ex- 45 tending along the length of the butt joints 9.

These recesses 10 give the advantage that any irregularities and projecting edges are no longer visible and cannot be objectionable. Although such irregularities and projecting edges are gen 50 erally of trifling order, they can hardly be avoided in assembling a frame from a plurality of butt joined members and heretofore they had to be removed by filing or polishing as they detracted from the appearance of the machine.

The recesses may consist of shallow grooves I0 provided in one of a pair of abutting frame memhers I, 2 or 3, for example the member 2 or 3. These grooves are preferably cast in the member so that machining at this place is entirely unnecessary. The joint seam 9 then lies in a corner of this groove l0 and is quite out of sight.

The purpose of the invention can also be achieved by providing projections It (Fig. 4) instead of depressions Ifl, at the abutting places of the members I, 2, and 3 which projections similarly extend along the whole length of the joint scams 9. These projections preferably consist of ribs IS on one of the abutting members I, 2 or 3. Also in this case the joint seam 9 which lies in a corner of the rib 16 is out of sight.

By the described means the advantage is obtained that the external members l, 2, 3 of the frame do not have to be finished at their abutting places after their assembly, nor need they be filed or polished in any manner. The finally assembled and connected external members i, 2, 3 can be lacquered without finishing operations even before the transverse members 4-8 are inserted. The polishing of the assembled external members at the joints prior to lacquering which was heretofore necessary, is thus eliminated, which polishing was very tedious especially in the case of cast or welded frames.

The further advantage can be obtained of singly lacquering the members of the frame before their assembly. Separate lacquering of the members is much easier to accomplish than the lacquering of the entire cage-like frame which occupies a considerable open space. A finish lacquering of the joints is not necessary because the lacquered recesses Ill, l5, or projections I6 of the singly lacquered members i, 2, 3 conceal the joint scams 9. The pleasing appearance of the lacquered external surfaces of the finished frame is in nowise impaired by the recesses or projections extending in regular pattern, on the contrary these recesses o-r projections have a decorative aspect.

The material of which the frame parts are made comprises any metal which is universally used in the present day manufacture of frames for'typewriters, calculating machines, etc. Furthermore the frame parts can be connected together by any known means and, for example, as shown in Fig. 1 screws 9' are used at the back and a hinge construction II to M at the front.

I claim as my invention:

1. A. frame for typewriters, calculating machines and the like, comprising a plurality of members abutting each other forming abutting lines at the external surface of the frame, parts of the external surfaces of two abutting members near an abutting line lying in the same plane, and one of the abutting members being provided with a strip along the abutting line having a non co-planar surface with said parts for placing the abutting line into the edge of a re-entering angle.

2. A frame according to claim 1, in which the non co-planar surface is counter-sunk below the external surface of the assembled frame.

3. A frame according to claim 1, in which the non co-planar surface is above the external surface of the assembled frame.

4. A frame according to claim 1, in which the plurality of members are lacquered before the frame is assembled.

RICHARD S'IUHLMACHER. 

